Timeline for Ehrhart period collapse for $123\ldots k$-avoiding Birkhoff polytope?
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
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| Jun 7, 2022 at 11:31 | history | edited | Sam Hopkins | CC BY-SA 4.0 |
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| Mar 17, 2022 at 19:18 | comment | added | Per Alexandersson | don't be fooled by small examples; I do not trust positivity of Ehrhart polynomials. For example, the order polytopes have non-negative Ehrhart polynomials for posets with at most 9 vertices, but there are examples with negative coefficients for 20 vertices. | |
| Jan 17, 2021 at 1:43 | vote | accept | Sam Hopkins | ||
| Jan 17, 2021 at 0:43 | answer | added | Gjergji Zaimi | timeline score: 5 | |
| Jan 1, 2021 at 19:19 | comment | added | Sam Hopkins | Btw a different perspective is that this polytope is a subpolytope of (a dilate of) the chain polytope of $[n]\times[n]$. | |
| Jan 1, 2021 at 16:26 | answer | added | Per Alexandersson | timeline score: 6 | |
| Jan 1, 2021 at 7:57 | comment | added | Sam Hopkins | The fact that all coefficients are positive is also surprising... | |
| Jan 1, 2021 at 5:05 | history | edited | Sam Hopkins | CC BY-SA 4.0 |
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| Jan 1, 2021 at 3:37 | history | edited | Sam Hopkins | CC BY-SA 4.0 |
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| Jan 1, 2021 at 3:07 | history | asked | Sam Hopkins | CC BY-SA 4.0 |